Hack: Always call the subview’s viewWillAppear, viewWillDisappear, etc.

This disables the [UIView _needsDidAppearOrDisappear] by always making
it equal YES. To be honest, I don’t understand what its purpose is, but
this appears to cause no side effects.

UIKit/Classes/UIView.m

@@ -230,7 +230,7 @@ - (void)addSubview:(UIView *)subview
         UIWindow *oldWindow = subview.window;
         UIWindow *newWindow = self.window;
 
-        subview->_needsDidAppearOrDisappear = [self _subviewControllersNeedAppearAndDisappear];
+        subview->_needsDidAppearOrDisappear = YES;//[self _subviewControllersNeedAppearAndDisappear];
 
         if ([subview _viewController] && subview->_needsDidAppearOrDisappear) {
             [[subview _viewController] viewWillAppear:NO];